Alcatel-Lucent 7210 SAS-X - Page 158

Pseudowire Redundancy Service Models
Page 158 7210 SAS-X, R6 OS Services Guide
The spoke-sdp is held down unless the pw-path-id is complete.
The system accepts the node-id of the pw-path-id saii or taii being entered as either 4-octet IP
address format <a.b.c.d> or unsigned integer format.
The control-word must be enabled to use MPLS-TP on a spoke-sdp.
The pw-path-id only configurable if all of the following is true:
• Network mode D
• SDP signaling is off
• Control-word enabled (control-word is disabled by default)
• Service type epipe or VPLS
• Mate SDP signaling is off for vc-switched services
• An MPLS-TP node-id/global-id is configured under the config>router>mpls>mpls-tp
context. This is required for OAM to provide a reply address.
In the vc-switching case, if configured on a mate spoke-sdp, then the TAII of the spoke-sdp must
match the SAII of its mate, and SAII of spoke-sdp has to match the TAII of its mate.
A control-channel-status no shutdown is allowed only if all of the following is true:
• Network-mode D
• SDP signaling is off
• Control-word enabled (control-word by default is disabled)
• The service type is epipe or VPLS interface
• Mate SDP signaling is off (in vc-switched services)
• pw-status-signaling is enabled (see below)
• pw-path-id is configured for this spoke.
The hash-label option is only configurable if SDP far-end is not node-id or global-id.
The control channel status request mechanism is enabled when the request-timer <timer>
parameter is non-zero. When enabled, this overrides the normal RFC-compliant refresh timer
behavior. The refresh timer value in the status packet defined in RFC 6478 is always set to zero.
The refresh-timer in the sending node is taken from the request-timer. The two mechanisms are not
compatible with each other. One node sends a request timer while the other is configured for
refresh timer. In a given node, the request timer can only be configured with both acknowledgment
and refresh timers disabled.
Once configured, the procedures below are used instead of the RFC 6478 procedures when a PW
status changes.